We demonstrated a narrow pulse-width long-wave infrared ZnGeP ₂ (ZGP) optical parametric oscillator (OPO) pumped by a 2.1 μm Ho:YAG master oscillator power-amplifier (MOPA). By short-cavity structure, a minimum pulse width of ∼12 ns was achieved at 1kHz, 2kHz and 3kHz in Ho:YAG oscillator. By employing a three-stage amplifier, a maximum average output power of 73.1 W with pulse width of ∼17 ns at the pulse repetition frequency of 3 kHz was obtained. Then a ZGP OPO pumped by the Ho:YAG MOPA was demonstrated. The maximum average output powers of 5.48 W at 8.2 μm and 22.4 W at 2.8 μm were obtained, corresponding to the pulse width of <10 ns.

中文翻译：

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由 Ho:YAG MOPA 系统泵浦的 5.4 W、9.4 ns 脉冲宽度、长波红外 ZGP OPO

我们展示了由 2.1 μm Ho:YAG 主振荡器功率放大器 (MOPA) 泵浦的窄脉宽长波红外 ZnGeP ₂ (ZGP) 光学参量振荡器 (OPO)。通过短腔结构，Ho:YAG 振荡器在 1kHz、2kHz 和 3kHz 下实现了约 12 ns 的最小脉冲宽度。通过采用三级放大器，在脉冲重复频率为 3 kHz 时，最大平均输出功率为 73.1 W，脉冲宽度约为 17 ns。然后展示了由 Ho:YAG MOPA 泵送的 ZGP OPO。获得了 8.2 μm 处 5.48 W 和 2.8 μm 处 22.4 W 的最大平均输出功率，对应于 <10 ns 的脉冲宽度。